#' Lipid test results of 500 person.
#'
#' A dataset containing the lipid profle and other attributes.
#'
#' @format A data frame with 2114 rows and 13 variables:
#' \describe{
#'   \item{id}{unique id of subject}
#'   \item{age}{baseline age}
#'   \item{gender}{gender of subject}
#'   \item{class}{class membership of per-subject}
#'   \item{smoke}{Ever smoke, 0=No, 1=Yes}
#'   \item{bmi}{BMI, in kg/^2}
#'   \item{hdl}{high density lipoprotein, mmol/L, time-varying}
#'   \item{ldl}{low density lipoprotein, mmol/L, time-varying}
#'   \item{tg}{triglyceride, mmol/L, time-varying}
#'   \item{time}{Followup time since baseline(time = 0)}
#'   \item{cvd}{cardiovascular diseases event}
#'   \item{os}{Overall Survival of cardiovascular diseases}
#' }
#' @source \url{http://www.diamondse.info/}
"lipdat"

